Spectroscopy of Tm3+-doped CaF2 waveguiding thin films grown by Liquid Phase Epitaxy

被引:3
|
作者
Loiko, Pavel [1 ]
Brasse, Gurvan [1 ]
Basyrova, Liza [1 ]
Benayad, Abdelmjid [1 ]
Doualan, Jean-Louis [1 ]
Meroni, Cesare [1 ]
Braud, Alain [1 ]
Dunina, Elena [2 ]
Kornienko, Alexey [2 ]
Baranov, Mikhail [3 ]
Daniil, Gozhalskii [3 ]
Camy, Patrice [1 ]
机构
[1] Univ Caen Normandie, UMR 6252 CEA CNRS ENSICAEN, Ctr Rech Ions Mat & Photon CIMAP, 6 Blvd Marechal Juin, F-14050 Caen 4, France
[2] Vitebsk State Technol Univ, 72 Moskovskaya Ave, Vitebsk 210035, BELARUS
[3] ITMO Univ, 49 Kronverkskiy Pr, St Petersburg 197101, Russia
关键词
Liquid phase epitaxy; Calcium fluoride; Thulium ions; Raman spectra; Optical spectroscopy; Luminescence; MOLECULAR-BEAM EPITAXY; MU-M LASER; OPTICAL SPECTROSCOPY; RAMAN-SCATTERING; EFFICIENT; LAYERS; CENTERS; SPECTRA; IONS; TM3+;
D O I
10.1016/j.jlumin.2021.118109
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Thulium-doped calcium fluoride (Tm:CaF2) single-crystalline films are grown on (100)-oriented undoped bulk CaF2 substrates by Liquid Phase Epitaxy (LPE) using LiF as a solvent. Their spectroscopic properties are studied in details. For similar to 2 at.% Tm-doped films, the active ions are predominantly isolated and are located in oxygen assisted trigonal sites, C-3v(T-2). With increasing the Tm doping level, ion clustering is promoted but it is slowed down as compared to bulk crystals. For similar to 6 at.% Tm-doped films, the majority of active ions form clusters resulting in a "glassy-like" spectroscopic behavior (smooth and broad spectral bands). For such layers, the maximum stimulated-emission cross-section for the F-3(4) -> H-3(6) transition is 0.14 x 10(-20) cm(2) at 1856 nm, the luminescence lifetime of the F-3(4) state is 21.70 ms and the emission bandwidth exceeds 180 nm. The transition probabilities of Tm3+ ions are determined using the Judd-Ofelt theory. The waveguiding properties of the Tm: CaF2 films are confirmed. Highly-doped Tm:CaF2 epitaxial films are promising for waveguide lasers at similar to 2 mu m.
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页数:13
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